Dual flow pipe fitting



Aug. 10, 1943. E. JQWOOD 2,326,716

DUAL FLOW PIPE FITTING Filed Sept. 19, 1941 3nventox E dw in J- We o o],

Gttorneg Patented-Aug. 10,1943

UNITED STATES PATENT pOFFlCE T r I 2,326,716 g t DUAL FLOWPIPEFITTING Edwin J. Wood, Detroit, ll/Iich. Application September 19, 1941, Serial- No. 411,458

2 Claims. (oneses) This invention relates to pipe fittingsand particularly fittings aiiording adual fluid flow.

In a not water or like system of heating, there may be economically employed a dual flow type of diametrically partitioned pipe, delivering hot fluid to the radiators atone side of its partition and accommodating a cooled return flow at the opposite side of such partition. It is desirable in using horizontal lengths of such pipe to flow the hot and cooled fluids respectively above and 5 below the partition, since the hot fluid connection of a radiator is commonly above the cooled fluid connection. Also location of the hotter fluid above the other minimizes transmission through the partition. Whenasection of the described pipe is extended upwardly and connected at its ends through partitioned elbows'to horizontal sections or" the pipe, one of such elbows may tend to reverse the required relation of the hot and cooled fluids in the corresponding horizontal pipe section.

An object of the invention is to provide a dual flow pipe coupling for connecting horizontally;

partitioned sections of pipe and placing the upper passage of each section in communication with the lower passage of the other section so-as to restore a proper relation of the passages, if such heat loss 7 by is improperly positioned beneath the cooled .fluid relation has-become reversed in a certainpipe section or fitting.

Another object is designed to avoid reversal of the proper relation of the fluid passages in connecting upright and horizontal sections of dual flow pipe.

These and various other objects are attained by the construction hereinafter described andillustrated in the accompanying drawing.

Fig. 1 is an axial vertical sectional view of one" type of dual flow coupling suited to the desired purpose.

Fig. 2 is a side View of said coupling.

Describing said views now in greater detail, the

to provide a dual flow elbow Cal reference characters I and 2 designaterespectively two aligned pipes similarly providedwith horizontal partitions 3, forming passages in each pipe designated H and C, for the flow of hot and cooled water or some other fluid. Said pipes are inserted in the ends oia coupling comprising a 7 short length of piped andaninserted partition 5 abutting the partitions s and spirally twisted of the coupling. Thus when the hot fluid passage passage, as'in the pipe i, the described coupling so connects to the pipe i as to assure la correct relation of the passages therein;

As is'cornmon, the pipes l and 2 are retained in the-coupling by an interposed thin layer of solder v 6. The partition 5is'retained in place by forming each of its end portions at eachpipe-engaging margin thereof with a pair of slight reverse indentations i and by forming thepipe A with indentations 8 engaging in the indentations ls Thus the partition 5 is restrained from shifting either longitudinally or rotatively in the pipe 4. The described fitting contributes very .m'a-' terially to the practicality of a dual flow system of piping, for-heating purposes, assuring that a proper relation orithe hot and cooled water passages in horizontal lengths of pipe may be maintained, or readily reestabiished'if disturbedin connecting such a length to a vertical section of the dual flow pipe.

What I claim is: g g

1; In a dual flow pipe, a partition inserted in said pipe in a substantially diametrical relation thereto, said partition being formed at opposite margins thereof with indentations projecting from opposite sides of the partition, and said pipe 1 having indentations engaging "in said indentations of the partition.

2. In a dual flow pipe, a partition inserted in said pipe in a substantially diametrical relation I thereto, said partition being formed at eachof its diametrically opposed'margins withtwo reverse indentations and said pipe having indentations engaging in said indentations of the" partition.

EDWIN J. W001). 

